IBM H4S, Setup, Operator, And Service Manual

Page: 47 / 141

Table 3-3. Diagnostic and maintenance functions (continued)
Function
Code
Diagnostic or Maintenance Function Instructions Location
P
Enable Post Error Reporting: When selected,
deferred-check conditions are reported to the host.
“Function Code P: Post Error Reporting
Enabled” on page 3-21
U
Disable Post Error Reporting: When selected,
deferred-check conditions are NOT reported to the host.
“Function Code U: Post Error Reporting
Disabled” on page 3-22
Entering Maintenance Mode
The drive must be in maintenance mode to run drive diagnostics or maintenance
functions. To place the unit in maintenance mode:
1. Make sure that no cartridge is in the drive.
2. Press the Unload Button three times within two seconds.
0
appears in the
Single-character Display (SCD), and the Fault Light turns amber.
Note: If a cartridge is in the tape drive, it will eject the first time that you press
the Unload Button and the drive will not be placed in maintenance mode.
To continue placing the drive in maintenance mode, perform the
preceding step. While in Maintenance Mode, the drive will not accept a
cartridge unless the drive requests it. The SCD will display a flashing
C
to indicate a cartridge needs to be inserted.
Maintenance functions cannot be performed concurrently with read or write
operations. While in maintenance mode, the drive does not receive SCSI
commands from the server.
Exiting Maintenance Mode
The drive must be in maintenance mode to run drive diagnostics or maintenance
functions. To exit maintenance mode:
1. Press and hold the Unload Button for 3 or more seconds then release the
button to take the drive out of maintenance mode. If no error is detected,
0
temporarily appears in the SCD, then goes blank. The drive then exits
maintenance mode and the Status Light will return to Green.
2. If an error is detected, the SCD shows an error code but still exits maintenance
mode. To determine the error, locate the code in Appendix A, “Error Codes and
Messages,” on page A-1. To clear the error, turn the power off, then on again.
Note: The drive also exits maintenance mode automatically after it completes a
maintenance function or after 10 minutes if no action has occurred.
Function Code 0: Maintenance Mode
Function Code
0
makes the drive available for running drive diagnostics or
maintenance functions.
1. Place the drive in Maintenance Mode. For instructions, see“Entering
Maintenance Mode.”
Chapter 3. Operating
3-9